Pump



Oct. 18, 1949. c, A, ERlCKsON 2,485,439

Filed NOV. 24, 1944 Patented Oct. is, 1949 UNITED STATES PATEN T 0F-FICE PUMP Charles A. Erickson, Dearborn, Mich., assigner,

bymesne -assignments, t o FL. J acobsCo., De-

troit, Mich., a corporation of Michigan Application November 24, '1944, Serial No. 564,961

This invention relates to a -pump and tomeans 'for providing a pump construction which is simple, sturdy and effective. vIt has for one object to provide Ya `simplified valve mechanism and a means for mounting a valve with a minimum 'of "complication and a minimum of additional parts.

`"Another object is to provide a valve mechanism `and seating means for association with a diaphragm pump, rthe mechanism comprising the Ydischarge valve inthe form of a flat ring associated with `a-seat in the form of a flat ring.

Another object is to provide in connection with a pump a combined valve containing body arid vapor dome by means of which the valve containing body which must be present includes within itself a valve or dome but need not be added as an extra member.

Another object is -to provide a Vdiaphragm pump arranged with a plurality of springs so arranged. that relatively light springs can lbe used and can secure Vaccurate and rapid operation.

Other objects will appear from time to time in the 'course of the specification and claims.

The invention is illustrated more or less diagrammatically in the accompanying drawings wherein:

Figure 1 is an elevation of one device;

vform 'of the Figure 2 is a longitudinal section taken at line 2-2 of `Figure 1;

Figure 3 is a ysectional detail through the vapor dome `and valve seating means illustrating a modied form;

Figure 4 is a perspective view of the outlet valve 'seat member. Y .Y

Like parts are indicated by like symbols throughout the specication and drawings.

As shown the invention comprises cast members and members which lare stamped, spun, pressed lor otherwise made. Although the invention is not limited to any particular `form or method of manufacture, in general for convenience of inanufacture the pump comprises two main -members which may be cast but need not be. As shown these include a lower housing member I which is shaped to provide an annular shoulder 2. The member I is also provided with an vannular depression 3 in which springs vare positioned and will be described below. The annular depression 3 is formed vabout 'a central opening 4 through which diaphragm operating means may extend and will be described below. Preferably integral with the portions I-, 2 and 3 is a pump lever lcontaining member 5 which may be open as at 6 and may be provided with a lateral flange 1 which is 2 perforated as at 8 to receive fastening means "such as screws or bolts by means of which the pump is se'c'ured to any suitable support. Secured also within themember 5 and preferably a'djacentits open end 6 'is a 'spring bearing member v9 which is hel'd in place by means of a Abolt I0. As shown themember 9 includes a pair of spring ears I I which engage and furnish a bearing for, a shaft I2 upon which a lever I3 is mounted. The lever "I3 may have a s eat or depression I-I formed at its outer end within which a cushioning member I5 may be positioned. A lever operating push rod I6 extends into the socket I'4 'and bears against the material I5. At its opposite en'd the lever is Kprovided with a Arounded member 'I1 which may have a cushioning sleeve VI8 positioned upon it. The sleeve engages a stirrup I9 which is .connected by means of 'a lbolt`20 a`n`d5a member 2| to a vdiaphragm 22. The edge of diaphragm 22 is preferably positioned over the'shoulder 2 'and in contact witha packing orsealing'nenber'. Asecon'd packing 'or sealing member 24 is positioned on top of the diaphragm and 'it is held in lplace together with the diaphragm 'and 'the packing 'member 23 by the upper 'husing member which will be described below.

`Secured to the diaphragm 22 by th'e rivet 2Il` is a stiifeningdi'sfc 25'o`n'the top 'of the diaphragm and a second -disc 26 on the underside of the diaphragm. 'A cup '21 'is 'also 'secured 'dn the underside or `the diaphragm.

Positioned bneaththe diaphragm is a plurality o' "coil springs 2'8, 29 and 30. These ycoil springs pear at end 'pch me inner Isurface off ,the annular'd. essioh 3 and at the other end upon 'the meer surface 5f the dise or piate 2t,

Thus rar the enstrucuen which is psitoed in the lower housing Vsectionk has been described. of theupper housing section includes member Whichmay b e genflly @i'iilfal cr Setion but 1S .emerged ias 4at 3.2, 3x2T t prin/'idev portions within which screws or 'other attaching means maybe positidd Ap intgral i'jnnerwau 33 denes between 1itself andthe portion 3| an annularA chamber 34 which constitutes a lvapor dome. The upper housinglsection may also be enlarged to provide an outlet or discharge passage connection 35 to which any suitable conduit or pipe may be connected and through which liquid is discharged from the pump. At its lower edge the upper housing 'section 3| is in contact with the sealing or gasket member 24 which lies on the upper surface of the diaphragm 22 as shown in Figure 2.

A combined inlet and closure member is positioned on the otherwise open upper end of the member 3l. As shown the member 36 has a downwardly depending overhanging flange 31 which overlies the reduced upper end 38 of the member 3I A gasket or sealing member 39 may be positioned as shown in Figure 2 to prevent leakage. An inlet connection member 4I) is formed for connection with an inlet conduit through which liquid reaches the interior of the pump.

One convenient means for securing the several housing members together comprises a bail 42 which is provided with membrs 43 which are engaged beneath the lower edge of the housing member 3l as shown in Figure 1. At its upper end the bail has threaded in it a locking screw 44 which is provided with a knurled or roughened knob 45 for manipulation. The connection member 36 may be provided with a depression 46 in which the lower end of the adjusting screw 44 is received. By means of the bail and screw construction the whole housing consisting in the main of three members, the lower housing member I, the upper housing memberl and the closure member 36 are readily and securely held together but may be easily separated by merely removing the bail. A locking means 46a may be used.

One important advantage of the invention resides in the simplicity of its construction, the vapor dome being formed integrally with a housing section and positioned within it so that it need not as is customary be made and assembled as a separate member which is ordinarily positioned outside of the pump housing and therefore requires additional space for the installation of the pump.

Another advantage resides in the simplicity of the valve construction. The outlet valve comprises an annular seat 41 which is provided with a plurality of perforations or openings 48. The

seat 41 is formed to define a plurality of coplanar opening direction, or in a direction away from the seat 4l is limited by a shoulder 49a, integrally formed on the outer portion of the inner wall 33. The valve seat member 41 is held in place by one or more screws 52.

The inlet valve assembly includes a series of raised members 53 which as shown in Figure 2, are separated by depressions 54. An inlet valve seat member 55 may be removably threaded in place in the wall section 33. An inlet valve 56 is normally held closed against the seat by a spring 5'! which acts against an annular shoulder 51a on the inner portion of the housing wall 33. Suction may unseat the valve and move it against the upper end of the members 53 which provide shoulder means 53a to limit downward movement of the valve 56 but permit liquid to enter through the openings or notches 54. A screen or other filtering member 58 may be thus positioned on the upstream side of the valve 56 and within the chamber formed by the wall 33.

In Figure 3 a modified form of construction is shown. The outlet or discharge valve seat member comprises a ring 59 which is permanently xed in position. The discharge valve construction is otherwise the same as that described above. Similarly the inlet valve seat is formed of a ring-like member 60 which is permanently pressed, welded, riveted or otherwise secured in place and the inlet valve details are the same as above described.

It will be realized that whereas I have described and illustrated a practical and operative device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting me to my precise showing.

This application is a continuation in part of my co-pending application Serial No. 540,217, filed June 14, 1944, now Patent No. 2,462,372, dated February 22, 1949.

The use and operation of my invention are as follows:

The device as shown is assembled and is positioned in a liquid line so that a liquid conduit is connected to the connection portion 40 and an outlet conduit for liquid is connected to the member 35. The push rod I6 is reciprocated. Obviously the device is desirable for a fuel pump for internal combustion engines and will ordinarily be associated with such an engine and driven thereby. The liquid handled will be fuel and will be drawn from a tank and moved to or against a carburetor. The pump lever I3 is moved up and down and alternately pulls down the diaphragm 22 compressing the springs 28, 29 and 30 and creating suction within the diaphragm chamber. This suction additionally holds the discharge valve 49 on its seat and moves the inlet valve 56 from its seat to contact with the member 53. Liquid enters passing through the screen 58 through the openings 54 and into the diaphragm chamber. When the movement of the lever I3 is reversed the springs force the diaphragm upwardly creating pressure within the diaphragm chamber. This pressure seats the inlet valve 56 against its seat 55 and opens the valve 49 against the spring 50 and allows the liquid to be discharged from the diaphragm chamber and to move outwardly through the outlet connection 35 to a point of use. The annular space 34 defined between the walls 3I and 33 serves as a pressure dome to equalize the flow of the liquid.

I claim:

1. In combination in a pump assembly, a housing member defining within itself an inlet passage, a vapor dome and an outlet passage said vapor dome being in communication with said outlet passage', said housing member shaped also to define an inlet valve stop, an inlet valveretaining member removably threaded into said housing adjacent said stop and shaped to dei-lne an inlet valve seat, an inlet valve adapted to seat on said valve seat, an outlet valve member comprising a ring having a plurality of perforations therein and a plurality of outlet valve seats individual to and surrounding said perforations, and an outlet valve comprising a ring positioned over said last-mentioned valve seats, and a spring in contact at one end with said ring-like valve, said housing shaped to provide a seat for the opposite end of said spring.

2. In combination in a pump assembly, a housing *member* de'iining- :withinfitself an inletpasrsage;v`` a -`vapor 'dome andf- "an outlet` passager. said housing member shaped alsorto denne :aninlet valve stop, lan inlet valve-retaining-v member removably threaded into' said` housing Ladjacentsaid stop l and shaped tofd'eiiue anfinlet-valveseat, an inlet valve adapted tof'seat ony saidvalve' seat, I an outlet valve member comprising yfa f ring having fa plurality of perOratiUns-thereinf andfa 'plurality of outlet -valve seats individual to 'and- `surrounding said fperforations, and an outlet,l valve 'comprising a ring ypositioned over said last-mentioned valve seats', and'a spring in `contact: fat fonefend with. saidv ring-like valve, said` housing yshaped 'to provid'earseat for the opposite end yof'said' spring, said YoutletA valve membePbeingheld removably in-V place by screws.l

3. Infcombination in =a ipump assembly', a housing member defining within itself anf'inlet: passage, a vapor dome'and-"anoutlet passage-said vapor- 'dome being 'in'A communication with said outlet passage, Said housing lmember shaped also to define an inlet'va'lve stop, an inlet valve-retaining memberremovably threaded into `said housing adjacent said stop and shapedtodene :aninlet valve seat, aninletvalve adapted to seat on said valve seat, an outlet valve member comprising a ring :having a plurality of perforations therein and a plurality of outlet valve seats4 individual' tol-and surrounding said perforations, andan outlet valve comprising a .ring positioned 'over said last-mentioned valve seats, and'alspringin contact at-one end withsaid ring.-like.valve, "said. Vhousing'shiauped to provide a seatA .foretheopposite end of said spring, said outlet valve member being perma-` nently pressed in placer 4, Incombination in ra pump assembly, a housing member defining within itself an inlet passage, a vapor dome and an outlet passage, said housing member shaped also to define an inlet valve stop, an inlet valve-retaining member removably threaded into said housing adjacent said stop and shaped to dei-lne an inlet valve seat, an inlet valve adapted to seat on said valve seat, an outlet valve member comprising a generally at ring having a plurality of perforations therein and a plurality of outlet valve seats individual to and surrounding said perforations, and an outlet valve Comprising a at ring positioned over said last-mentioned valve seats, and a spring in contact at one end with said ring-like valve, said housing shaped to provide a seat for the opposite end of said spring.

5. In combination in a pump assembly, a housing member defining within itself an inlet passage, a vapor dome and an outlet passage said vapor dome being in communication with said outlet passage, said housing member shaped also to define an inlet valve stop, an inlet valve-retaining member removably threaded into said housing adjacent said stop and shaped to denne an inlet valve seat, an inlet valve adapted to seat on said valve seat, an outlet valve member comprising a generally flat ring having a plurality of perforations therein and a plurality of outlet valve seats individual to and surrounding said perforations, said ring shaped to dene about each of said perforations a raised seat, and an outlet valve comprising a flat ring positioned over said last-mentioned valve seats, and spring in contact at one end with said ring-like valve, Asaid housing shaped to provide a seat for the opposite end of said spring.

6. In combination in a pump assembly, a housing member defining within itself an inlet pasing memberden'ing .within itself an inlet pas- 6 sage;1afvapor domeandfan'outlet passage said vapor dome being infcommunication with `said outletpassage; said housing member shapedV also todenne' aninle't valve stop,.an1inlet valveeretaining member removably threaded into said housing adjacent saidstop fand shaped'to denne an inlet valve "seatii'anrl inlet valve adapted to seat on said valve seat, an outlet valve member comprising a kgenerally flat ring having a plurality of perforations therein and a plurality ofoutlet valve seats individual to andl surrounding said perforations, said ring shaped to denne about each of said perforations a raised seat, and an outlet valve comprisinga nat ring positioned over said last-men'- tioned valveseats', and a spring in contactatone endfwithe'said ring-like valve, said housingshaped tmpl-Ovide a seat-'for the opposite end vof said spring,v said outletya'lve disk being held removably in\ place by screws.

rI.f'ncombin'ation'in a pump assembly, a houssage,'a vapor'fdomeand an outlet passage, said housing member shaped also to denne an inlet valvestop; an inlet valve-retaining member removably threaded into said housing adjacent said stoplandshaped to dene an inlet valveseaaan inlet valveadapted to seat on said valve seat, an outlet valve member'comprising a generally nat ringh'aving a plurality of perforations therein land a plurality of outlet valve seats individual to andsurrounding said perforations, said4 ring shaped to dene abouteach of said perforations a raised seat, and an outlet valve comprising a flat ringpositioned over-said last-mentioned valve seats', and a spring incontact at one end with said ringlike valve', said housing shaped to provide azseat `for1th opposite end of said spring,fsaid outlet valve disk being permanently pressed in place.

8. In combination in a pump assembly, a housing member defining within itself an inlet passage, a vapor dome and an outlet passage, said vapor dome being in communication with said outlet passage, said housing member shaped also to define an inlet valve stop, an inlet valve-retaining member removably threaded into said housing adjacent said stop, an outlet valve member comprising a ring having a plurality of perforations therein and a plurality of outlet valve seats individual to and surrounding said perforations, and anoutlet valve comprising a ring positioned over said last-mentioned Valve seats, said outlet passage being positioned immediately adjacent said outlet valve member, and a spring in contact at one end with said ring-like valve, said housing shaped to provide a seat for the opposite end of said spring, said outlet Valve member being held removably in place by screws.

9. In combination in a pump assembly, a housing member defining within itself an inlet passage, a vapor dome and an outlet passage, said vapor dome being in communication with said outlet passage, said housing member shaped also t0 define an inlet Valve stop, an inlet valve-retaining member removably threaded into said housing adjacent said stop, an outlet Valve member comprising a generally nat ring having a plurality of perforations therein and a plurality of outlet valve seats individual to and surrounding said perforations, and an outlet valve comprising a flat ring positioned over said last-mentioned valve seats, said outlet passage being positioned immediately adjacent said outlet valve member, and a spring in contact at one end with said ringlike valve, said housing shaped to provide a seat for the opposite end of said spring.

10. In a fuel pump, a housing member having inner and outer concentric cylindrical walls dening a central inlet chamber and an annular outlet chamber and pressure dome concentric therewith, an inlet valve seat element and an inlet Valve extending transversely of said inner cylindrical wall and adapted to close said inlet chamber at its lower end, an annular outlet valve seat element and an annular outlet valve extending transversely of said housing member and adapted to close said outlet chamber at its lower end, said housing member having integrally formed inner and outer shoulder portions adapted to engage said inlet and outlet valves respectively to limit movement thereof in an opening direction, and spring means individual to said valves and urging them toward their associated seat elements.

11.In a fuel pump, a housing member having inner and outer concentric cylindrical walls dening a central inlet chamber and an annular outlet chamber and pressure dome concentric therewith, an inlet valve seat element and an inlet valve extending transversely of said inner cylindrical wall and adapted to close said inlet chamber at its lower end, an annular outlet valve seat element and an annular outlet valve extending transversely of said housing member and adapted to close said outlet chamber at its lower end, said housing member having integrally formed inner and outer shoulder portions adapted to engage said inlet and outlet valves respectively to limit movement thereof in an opening direction, and coil spring means individual to said valves and urging them toward their associated seat elements, said housing member having integrally formed inner and outer annular portions individual to said spring means and adapted to seat and engage one end thereof.

12. In a fuel pump, a housing member having inner and outer concentric cylindrical Walls dening a central inlet chamber and an annular outlet chamber and pressure dome concentric therewith, an inlet valve seat element and an inlet valve extending transversely of said inner cylindrical wall and adapted to close said inlet chamber at its lower end, an annular outlet valve seat element and an annular outlet valve extending transversely of said housing member and adapted to close said outlet chamber at its lower end, said Outlet valve seat element having a plurality of apertures spaced arcuately thereabout and coplanar narrow annular raised seat portions individual to and surrounding said apertures, and spring means individual to said valves and urging them toward their associated seat elements.

CHARLES A. ERICKSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 986,122 Astrom Mar. 7, 1911 1,905,246 Schweisthal A-pr. 25, 1933 1,938,403 Rockwell Dec. 5, 1933 2,036,452 Babitch et al Apr. 7, 1936 2,222,869 Jencick Nov. 16, 1940 FOREIGN PATENTS A Number Country Date 440,693 Great Britain 1936 

